Chemistry formula & Reactions for class 12 chapter- Alcohol phenol and ether
Class 12 chapter- Alcohol phenol and ether
Alcohols: When one hydrogen atom of alkene is replaced by –OH group, the compounds obtained are called ‘Alcohols’ having general formula ‘CnH2n+1OH’. They are also called monohydric alcohols because they contain one –OH group, e.g., CH3OH (Methanol), C2H5OH (Ethanol), etc.
Electrophile: It is positively charged or neutral species which is electron deficient, e.g.. NH4+, BF3, AlCl3, SO3, FeCl3 etc
Nucleophile: It is negatively charged or neutral species with lone pair of electrons. E.g.,
Salicylic acid (2-hydroxybenzoic acid): It is formed by the reaction of sodium phenoxide with CO2 under pressure at 400 K followed by acidification of product. It is used to prepare aspirin. This reaction is known as Kolbe’s reaction.
Aspirin (2-acetoxybenzoic acid): It is prepared by treatment of salicylic acid with acetic anhydride. It is a component of aalgesics (tablets used for giving rlief in pain) and antipyretic (tablets used for reducing temperature of feveral body).
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